xylon97
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 6 What's wrong in this equation? 3 inscribed angles on circle 2 Proof that $(a\cdot a)\bmod b=\Big((a\bmod b)\cdot(a\bmod b)\Big)\bmod b$ 1 How do I derive the identity $\sin(a+b)=\sin(a)\cos(b) + \cos(a)\sin(b)$ using the Unit Circle

### Reputation (291)

 +5 Continued fractions help +60 What's wrong in this equation? +2 Curious $\sum _{n=1}^{\infty} \frac{1}{n^2 - x^2}$ identity +2 $x$ is rational, $\frac{x}{2}$ is rational, and $3x-1$ is rational are equivalent

### Questions (3)

 6 Continued fractions help 2 Twice a triangle is triangle 1 Establishing formula from recurrence

### Tags (12)

 6 calculus 1 algebra-precalculus × 2 6 fake-proofs 1 trigonometry 3 geometry 0 recurrence-relations × 2 3 euclidean-geometry 0 recursion 2 modular-arithmetic 0 number-theory

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 Sports 384 rep 210 Mathematics 291 rep 18 Stack Overflow 209 rep 15 Code Review 128 rep 5 Programming Puzzles & Code Golf 101 rep